Method of electrical butt-welding.



T. E. MURRAY, JR. METHOD OF ELESTRICAL BUTT WELDING. APPLICATION man NOV-9,1917.

" 5 ,g73, Patented 12,1912;

INVENTOR UNITED STATES PATENT ossicn METHOD OF ELECTRICAL E'UTT-WElllifils'fii.

Specification of Letters fistent.

Potent-ed Mail. 312, 13.91%.

Application filed November 9, 151?. Serial 330. 201,912.

To all whom it may concern:

Be it known that I, THOMAS E. MURRAY, Jr., a citizen ofthe United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a. certain new and useful Improvement in Methods of Electrical Butt-Welding, of which the following is a specification.

The invention is a method of electrical butt-welding, wherein the bodies to be welded are each-"separately and independently electrically heated to render their butt ends plastic, and said butt ends while so plastic are moved into contact and pressed together to cause the desired union between them.v

In the accompanying drawings-- Figure 1 shows the rods to be buttwelded in elevation, and the electrodes thereon in section. Fig. 2 shows the rods and electrodes iii-elevation and after welding. Fi 5-3 is a section on theline X, of Fig. 1. I

Similar numbers and letters of reference indicate like parts.

1 and 2 are metal rods to be butt-welded. The welding electrodes 3, l are here shown as respectively carried by said rods. Each electrode is formed in two substantially semicircular sections, as as, b and c, 65, seperated by 2. body 7 of insulating material. The butt-ends of the rods protrude beyond the electrodes. On one of the electrodes, as 3, maybe secured stops 5' of insulating near terial. The sections a, b of electrode 3 are connected in multiple with the sections c cle? electrode i.

ends into contact and-pressing gather to cause them to unite.

. signature in presence oi tw The operation is as follows: Circuit bo s s ing established, the rods 1 and 2 ere sepae rately and independently heated by the current on said circuit, and their facing butt- .entis ;e tl us rendered plastic. Said buttends while plastic are then brought into contact and pressed together to produce the desired. union between them. The function of the stops 5 is to limit the approxime tion of the electtodes 3, Land so regulate the amount'of motel taken 11 at the welded joint. The current may be interrupted immedictely before the butt-ends of the rods come into contact, or it may be maintained. after said contact has been established and during the pressing together of said ends.

1. The method of electrical butowelding, which consists in electrically heating each of the bodies to joined separately and in-- dependently oi one another until their buttends become plastic, and then moving said them toil. The method of electrical bnttevelding,

which consists in electrically heating each of: I

the bodies to be joined separately and independently of one anotheruntil their butt ends become plsstic, then interrupting the welding current, and while said butt-ends are still plastic, moving said butt-ends into contact and pressing them together to them to unite.

In testimony whereof I have eilixed my QWTEHGSSQS. Jib l1). MUKRAY, JR.

TH U- Witnesses:

Gmrsoon Pose-m, MAY 1. biotin-ins, 

